Investigate Committee spokesperson Svetlana Petrenko said in a statement on Telegram that a criminal case was being investigated in Moscow “regarding an attempt on the lives of traffic police officers”.
The officers have been named by Russian media as Ilya Klimanov, 24, and Maxim Gorbunov, 25.
Speaking to the Reuters news agency, Alexander, a resident who lives close by, said: “There was an explosion.
“It was loud bang – like with the car a few days ago.”
Russia said it suspected Ukraine was behind Monday’s explosion, however Ukraine has not said whether it was involved in Fanil Sarvarov’s death.
It is also not known whether the two explosions are linked.
Sarvarov, 56, was the head of the armed forces’ operational training department.
He was the third military official to have been killed in bomb attacks in the Russian capital over the last year.